α = 1 (slider from -5 to 5, step 0.1)
h(x) = 1 / (x - α)
a = -1 (slider from -10 to 5, step 0.1)
b = 0.5 (slider from -5 to 5, step 0.1)
c = 3 (slider from -5 to 5, step 0.1)
d = 1.5 (slider from -5 to 5, step 0.1)
A: (a, h(a))
B: (b, h(b))
C: (c, h(c))
D: (d, h(d))
poly1, a_1, b_1, c_1, d_1 = Polygon(A, B, C, D)